Calk.



H. L. DAVS.

CALK.

APPLICATION HLEDJULY 5,196.

Patented Oct. 23, 1917.

ll/ i* HARE? n DAVISg or GREENIVILLE, MAINE.

TO' dilo/tom it may camer a Be it known that I, Hanna( L'. citizen ofthe Untd States, residing at Grreenville in the county of Piscataquis, in the State of Maine,have'invented certain new and useful Improvements in-Calks, of which the following isa specification. i

Davis, a`

Specfican of Letters Eatent.

Myinvention' relatesto calls "f'r th' e soles' of boots, shoes, mocassins, and the like, and while useful for, various purposes, is more particularly adapted for the use of lumbermen in driving logs.

The object of the invention is to provide a calk which may be secured in the outer sole or heel-lift of a shoe in such manner that displacement thereof from a predetermined position is eifectively prevented.

A further object of the invention resides in the provision of a metallic hearing surface for the call( so that it will not work loose, as the sole or heel-lifts become worn or wet. I

These objects together with other attendant advantages will be apparent as the invention becomes better understood by reference to the accompanying specification and drawings forming a part thereof, and in which like characters of reference are used to indicate like parts throughout the several Views thereof.

Referring to the drawings, Figure l is a View partly in section showing the application of my improved call( to the outer lift of a shoe.

Fig. 2 is a perspective view of the calk.

Fig. 3 is a perspective view of the bushing.

In devices of this character, as heretofore used, it has been customary to provide the shank of the calk throughout a portion of its length with corrugations or threads adapted to engage the leather upon driving or screwing the calks into position therein. Such devices have proven unsatisfactory for the reason that if the leather becomes wet or badly worn the calks have a tendency to work loose. Metallic bushings have also been used to some extent, but no practical method of securing the bushing in position so as to most effectively coperate with the calk and maintain the fiexibility of the shoe has been conceived.

Referring now more particularly to the drawings, my invention conprises a metallio bushing or sleeve 1 adapted to be inserted through any desired tl'i icknes's otfi leather 52' by. punchingt or cutting suitable open'ings therein. It :Will be apparent that the nurnber and arrangement of these opei`1ing s `may be' varied as desired to" best adapt the shoe bushing l may be provided with a fiange or head' 3-; and prerrabty of 'a lengthslightly' greater than the thickness of the leather to which it is applied, 'so that the lower-end projects below the surface thereof, to permit the formation of a collar or fiange a in any desired manner, as by swagng or 'the like. By reason of this Construction, the bushing is securely held in position, and the edges of the openings in the leather are protected against wear and distortion, as well as the entrance of foreign matter.

After the bushings have been secured in position, the calks or points 5 are inserted therein. These points may be made of any desired material and preferably have an external diameter substantially equal to the internal diameter of the bushing, so that a tight fit therewith is insured. The point is provided with a head 6 of comparatively large diameter, and having a plurality of Spurs 7 on the upper surface thereof( These e Spurs may be of any desired fornation, but I have found that when pyramidal in shape they readily penetrate the coperatin'g layer 8 of leather and present a comparatively large bearing surface thereto so as to effectively prevent relative turning movement between the parts.

F rom the foregoing it will be apparent that the head of the calk is securely gripped between the adjacent layers of leather, which are sewed or nailed together in any usual manner, and firmly held against the fiange or head of the bushing. The shank of the call: also has a large metallic hearing surface, tending to reduce wear and play to a minimum, so that the calk is always in position to most efiectively prevent the wearer from slipping. Due to the location of the head of the calk, accidental removal or loss thereof is prevented, while calks having a threaded engagement are likely to work loose, thereby neoessitating frequent repair.

The flange 4 regulates the depth to which the calks may penetrate, and also acts as an obstruction to the entrance of dirt and noisture to that portion of the leather immediately adjoiningthe calk, thereby keeping the leather in good condition.

Having thus described my invention What 1 claim is l. A calk foishoes comprsng a bushng adapted to be Secured by fianges at each end' within the lower lift of a Shoe, a point passing through said bushing, a head for said. point seated on one of said fianges, and means on said head for engagement With the adjoining lift of the Shoe.

2. A calk ,for shoes comprising a bushing adapted to be Secured by flanges at each end within the lower lift of a Shoe, a point passing through said bushing, a head for said point seated on one of said fianges, and

Spurs on said head for engagement With 'the adjoiniig lift of the Shoe.

3. A calk for shoes conprisng a bushing adapted to be Secured by fianges at each end within the lower lift of ashoe, a point passing through said bushing, a head for said point seated on one OI" said flanges, and pyramid-shaped Spurs on said head for engagement With the adjoining lift of the Shoe in testimony whereof, I have hereiinto Witnesses:

FRAN H. BUDDEN, R. H. DUNKER.

copies of this patent may be obtained for five cents each, by addressng the "Commissoner of Patents,

Washingtom D. G." i 

